I now stay far away from anything related to or being offered free or for trial by Comodo, its name ironically but appropriately close enough to another word for toilet, that being "commode".

Trying to download and update their free AV definitions led to crash after crash, and after uninstalling, the Comodo AV software left behind literally hundreds of registry changes and entries that needed to be deleted one at a time, and some couldnt be deleted regardless b/c they were being shared by other vital Windows software programs..what a damned mess.